Arid
DOI10.1111/j.1365-246X.2011.05010.x
Dating inset terraces and offset fans along the Dehshir Fault (Iran) combining cosmogenic and OSL methods
Le Dortz, K.1,2; Meyer, B.1,2; Sebrier, M.1,2; Braucher, R.3; Nazari, H.4; Benedetti, L.3; Fattahi, M.5,6; Bourles, D.3; Foroutan, M.4; Siame, L.3; Rashidi, A.7; Bateman, M. D.6
通讯作者Le Dortz, K.
来源期刊GEOPHYSICAL JOURNAL INTERNATIONAL
ISSN0956-540X
EISSN1365-246X
出版年2011
卷号185期号:3页码:1147-1174
英文摘要

P>10Be and 36Cl cosmic ray exposure (CRE) and optically stimulated luminescence (OSL) dating of offset terraces have been performed to constrain the long-term slip rate of the Dehshir fault. Analysis of cosmogenic 10Be and 36Cl in 73 surface cobbles and 27 near-surface amalgams collected from inset terraces demonstrates the occurrence of a low denudation rate of 1 m Ma-1 and of a significant and variable inheritance from exposure prior to the aggradation of these alluvial terraces. The significant concentrations of cosmogenic nuclides measured in the cobbles collected within the riverbeds correspond to 72 +/- 20 ka of inheritance. The mean CRE age of the surface samples collected on the older terrace T3 is 469 +/- 88 ka but the analysis of the distribution of 10Be concentration in the near-surface samples discard ages older than 412 ka. The mean CRE age of the surface samples collected on terrace T2 is 175 +/- 62 ka but the 10Be depth profile discard ages older than 107 ka. For each terrace, there is a statistical outlier with a younger age of 49.9 +/- 3.3 and 235.5 +/- 35.4 ka on T2 and T3, respectively. The late sediments aggraded before the abandonment of T2 and inset levels, T1 b and T1a, yielded OSL ages of, respectively, 26.9 +/- 1.3, 21.9 +/- 1.5 and 10.0 +/- 0.6 ka. For a given terrace, the OSL ages, where available, provide ages that are systematically younger than the CRE ages. These discrepancies between the CRE and OSL ages exemplify the variability of the inheritance and indicate the youngest cobble on a terrace, that minimizes the inheritance, is the most appropriate CRE age for approaching that of terrace abandonment. However, the upper bound on the age of abandonment of a terrace that is young with respect to the amount of inheritance is best estimated by the OSL dating of the terrace material. For such terraces, the CRE measurements are complementary of OSL dating and can be used to unravel the complex history of weathering and transport in the catchment of desert alluvial fans. This comprehensive set of dating is combined with morphological offsets ranging from 12 +/- 2 to 380 +/- 20 m to demonstrate the Dehshir fault slips at a rate in the range 0.9 mm yr-1-1.5 mm yr-1. The variable inheritance exemplified here may have significant implications for CRE dating in arid endorheic plateaus such as Tibet and Altiplano.


英文关键词Geomorphology Seismicity and tectonics Continental tectonics: strike-slip and transform Tectonics and landscape evolution
类型Article
语种英语
国家France ; Iran ; England
收录类别SCI-E
WOS记录号WOS:000290687100006
WOS关键词OPTICALLY STIMULATED LUMINESCENCE ; SLIP-RATE ; ACTIVE TECTONICS ; PRODUCTION-RATES ; CL-36 PRODUCTION ; HALF-LIFE ; BE-10 ; SINGLE ; RADIONUCLIDES ; GLACIATION
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/168293
作者单位1.UPMC Univ Paris 06, UMR 7193, ISTEP, F-75005 Paris, France;
2.CNRS, ISTEP, UMR 7193, F-75005 Paris, France;
3.CEREGE, UMR6635, Aix En Provence, France;
4.Geol Survey Iran, Res Inst Earth Sci, Tehran, Iran;
5.Univ Tehran, Inst Geophys, Tehran 14174, Iran;
6.Univ Sheffield, Sheffield Ctr Int Drylands Res, Sheffield S10 2TN, S Yorkshire, England;
7.Geol Survey Iran, Kerman, Iran
推荐引用方式
GB/T 7714
Le Dortz, K.,Meyer, B.,Sebrier, M.,et al. Dating inset terraces and offset fans along the Dehshir Fault (Iran) combining cosmogenic and OSL methods[J],2011,185(3):1147-1174.
APA Le Dortz, K..,Meyer, B..,Sebrier, M..,Braucher, R..,Nazari, H..,...&Bateman, M. D..(2011).Dating inset terraces and offset fans along the Dehshir Fault (Iran) combining cosmogenic and OSL methods.GEOPHYSICAL JOURNAL INTERNATIONAL,185(3),1147-1174.
MLA Le Dortz, K.,et al."Dating inset terraces and offset fans along the Dehshir Fault (Iran) combining cosmogenic and OSL methods".GEOPHYSICAL JOURNAL INTERNATIONAL 185.3(2011):1147-1174.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Le Dortz, K.]的文章
[Meyer, B.]的文章
[Sebrier, M.]的文章
百度学术
百度学术中相似的文章
[Le Dortz, K.]的文章
[Meyer, B.]的文章
[Sebrier, M.]的文章
必应学术
必应学术中相似的文章
[Le Dortz, K.]的文章
[Meyer, B.]的文章
[Sebrier, M.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。